Summary

Abstract: The Soil - Plant - Atmosphere - Water (SPAW) Hydrologic Budget Model is a daily hydrologic budget model for agricultural fields and ponds (wetlands, lagoons, ponds and reservoirs). Included are irrigation scheduling and soil nitrogen. Data input and results are graphical screens. SPAW was developed by Dr. Keith Saxton, USDA-ARS (retired). Included in this download is the Soil Water Characteristics Hydraulic Properties Calculator, a graphical program developed by Saxton and Walter Rawls for estimating soil water tension, conductivity and water holding capability based on soil texture, organic matter, gravel content, salinity, and compaction. SPAW and the Soil Water Characteristics Hydraulic Properties Calculator are bundled in a single installation file. The installation program allows the user to choose whether to install SPAW, the calculator, or both. [Summary provided by the USDA.]

Related URL

Link: GET SERVICE > GET SOFTWARE PACKAGE Description: Register and Download SPAW.

Service Citation

Originators: Keith E. Saxton Title: Soil - Plant - Atmosphere - Water (SPAW) Hydrologic Budget Model Provider: USDA Agricultural Research Service URL: http://hrsl.arsusda.gov/SPAW/Index.htm

Service Keywords

MODELS >HYDROLOGIC AND TERRESTRIAL WATER CYCLE MODELS   [Definition]

Science Keywords

ATMOSPHERE >PRECIPITATION >PRECIPITATION AMOUNT   [Definition]

ATMOSPHERE >PRECIPITATION >RAIN   [Definition]

BIOSPHERE >TERRESTRIAL ECOSYSTEMS >AGRICULTURAL LANDS   [Definition]

TERRESTRIAL HYDROSPHERE >SURFACE WATER >DRAINAGE   [Definition]

TERRESTRIAL HYDROSPHERE >SURFACE WATER >HYDROPATTERN   [Definition]

TERRESTRIAL HYDROSPHERE >SURFACE WATER >LAKES   [Definition]

TERRESTRIAL HYDROSPHERE >SURFACE WATER >RIVERS/STREAMS   [Definition]

TERRESTRIAL HYDROSPHERE >SURFACE WATER >WATER CHANNELS   [Definition]

TERRESTRIAL HYDROSPHERE >SURFACE WATER >WATERSHED CHARACTERISTICS   [Definition]

LAND SURFACE >SOILS >HYDRAULIC CONDUCTIVITY   [Definition]

LAND SURFACE >SOILS >NITROGEN   [Definition]

LAND SURFACE >SOILS >ORGANIC MATTER   [Definition]

LAND SURFACE >SOILS >SOIL SALINITY/SOIL SODICITY   [Definition]

LAND SURFACE >SOILS >SOIL COMPACTION   [Definition]

LAND SURFACE >SOILS >SOIL MOISTURE/WATER CONTENT   [Definition]

LAND SURFACE >SOILS >SOIL TEXTURE   [Definition]

LAND SURFACE >SOILS >SOIL WATER HOLDING CAPACITY   [Definition]

ISO Topic Category

FARMING BIOTA CLIMATOLOGY/METEOROLOGY/ATMOSPHERE GEOSCIENTIFIC INFORMATION

Access Constraints

User registration is required before downloading.

Use Constraints

The USDA distributes SPAW and Soil Water Characteristics without cost or obligation, only for scientific and analytic hydrologic purposes with no expressed warranties of accuracy or methodology beyond that normally expected of peer reviewed documentation. At the users discretion, the installation program will install either or both applications.

Keywords

Hydrology

Model

Agriculture

Soils

Service Provider

Agricultural Research Service, U. S. Department of Agriculture Service Provider Personnel Name: USDA-ARS Phone: 254-770-6500 Fax: 254-770-6561 Contact Address: USDA-ARS Grassland Soil and Water Research Laboratory 808 E. Blackland Rd. City: Temple Province or State: TX Postal Code: 76502 Country: USA

Distribution Media

Distribution_Media: Online Fees: No fees

Personnel

KEITH E. SAXTON Role: TECHNICAL CONTACT Phone: 509-332-7277 Fax: 509-332-7277 Email: ksaxton at roadrunner.com

TYLER B. STEVENS Role: SERF AUTHOR Phone: (301) 614-6898 Fax: 301-614-5268 Email: Tyler.B.Stevens at nasa.gov Contact Address: NASA Goddard Space Flight Center Global Change Master Directory City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Creation and Review Dates

SERF Creation Date: 2012-04-26 SERF Last Revision Date: 2012-05-01